Magnets and Magnetic Fields Flashcards
What has poles?
Magnets
How many poles does these magnets have?
2
What are the two poles called?
North and South
Where is it called when magnets and other magnetic materials in a region experience a force?
Magnetic Field
What way does the magnetic field lines go?
From north to south
What does the way of the lines show?
It shows the way of another force acting upon the north pole would be at each part of the field
The closer the lines are together shows what?
That the magnetic field is stronger at this part
What part of a magnetic field would be the strongest?
At the poles
If the magnetic field is strongest at the poles what would this mean for magnetic forces?
They are also strongest at the poles
What are like poles
Poles that are the same like south poles and south poles
What happens when like poles meet or are near each other?
They repel
What is an unlike pole?
Poles that aren’t the same like north with south
What would happen when unlike poles are near each other?
They are attracted to one another
Name the characteristic of the magnetic field of an unlike pole.
Uniform field
What is a uniform field and how would you draw this?
Lines are attracted to each other and so connect. They would be drawn with at least three parallel lines same distance apart and curved lines to each poles
Between the poles what are the strengths like different or the same?
Same
What do you need to find the magnetic field of a magnet?
(5 things)
-compass and its needle
-Magnet
-paper
-pencil
Which way does it go:
A. Mark direction of compass needle by drawing two dots- one at each end of the needle
B. Repeat this method at different points around the magnet to get several field lines.
C. Put the magnet on a piece of paper and draw around it
D. Move the compass so that the tail end of the needle is where the tip of the needle is in the previous position and put a dot by the tip of the needle. Repeat this and then join up the marks you’ve made. Having one field line around the magnet.
E. Draw arrows from North to South on field lines
F. Place the compass on the paper near the magnet. The needle will point in the direction of the field line at this position.
C
F
A
D
B
E
What do compasses align the field lines with when there is no magnetic field given?
The Earth’s north pole
Why does the compass move with the Earth’s north pole?
It generates its own magnetic field
What is the north pole actually?
A magnetic south pole
If the north pole in the earth is actually a magnetic south pole what does this mean?
That the core is magnetic
